[vala] xcb: Replies are nullable and errors are optional



commit 01b3439e9e6665dc9db41373694f4054ea1ed982
Author: Robert Ancell <robert ancell canonical com>
Date:   Sun Jun 1 18:45:53 2014 +0800

    xcb: Replies are nullable and errors are optional
    
    Also a few whitespace consistency changes thrown in.

 vapi/xcb.vapi |  152 ++++++++++++++++++++++++++++----------------------------
 1 files changed, 76 insertions(+), 76 deletions(-)
---
diff --git a/vapi/xcb.vapi b/vapi/xcb.vapi
index 7542a36..80a62e4 100644
--- a/vapi/xcb.vapi
+++ b/vapi/xcb.vapi
@@ -36,9 +36,9 @@ namespace Xcb {
                public uint32 generate_id ();
                public Setup get_setup ();
                public GenericEvent wait_for_event ();
-               public GenericEvent poll_for_event();
+               public GenericEvent poll_for_event ();
                public int get_file_descriptor ();
-               public Xcb.GenericError request_check (Xcb.VoidCookie cookie);
+               public Xcb.GenericError? request_check (Xcb.VoidCookie cookie);
 
                public VoidCookie create_window (uint8 depth, Window wid, Window parent, int16 x, int16 y, 
uint16 width, uint16 height, uint16 border_width, uint16 _class, VisualID visual, uint32 value_mask, [CCode 
(array_length = false)] uint32[]? value_list);
                public VoidCookie create_window_checked (uint8 depth, Window wid, Window parent, int16 x, 
int16 y, uint16 width, uint16 height, uint16 border_width, uint16 _class, VisualID visual, uint32 value_mask, 
[CCode (array_length = false)] uint32[]? value_list);
@@ -69,98 +69,98 @@ namespace Xcb {
 
                public GetWindowAttributesCookie get_window_attributes (Window wid);
                public GetWindowAttributesCookie get_window_attributes_unchecked (Window wid);
-               public GetWindowAttributesReply get_window_attributes_reply(GetWindowAttributesCookie cookie, 
out GenericError? e);
+               public GetWindowAttributesReply? get_window_attributes_reply (GetWindowAttributesCookie 
cookie, out GenericError? e = null);
 
                public VoidCookie change_window_attributes (Window wid, uint32 value_mask, [CCode 
(array_length = false)] uint32[]? value_list);
                public VoidCookie change_window_attributes_checked (Window wid, uint32 value_mask, [CCode 
(array_length = false)] uint32[]? value_list);
 
                public QueryTreeCookie query_tree (Window wid);
                public QueryTreeCookie query_tree_unchecked (Window wid);
-               public QueryTreeReply query_tree_reply (QueryTreeCookie cookie, out GenericError? e);
+               public QueryTreeReply? query_tree_reply (QueryTreeCookie cookie, out GenericError? e = null);
 
                [CCode (cname = "xcb_intern_atom")]
-               private InternAtomCookie vala_intern_atom(bool only_if_exists,uint16 len, string name);
+               private InternAtomCookie vala_intern_atom (bool only_if_exists, uint16 len, string name);
                [CCode (cname = "vala_xcb_intern_atom")]
-               public InternAtomCookie intern_atom(bool only_if_exists,string name) {
-                       return this.vala_intern_atom(only_if_exists,(uint16)name.length,name);
+               public InternAtomCookie intern_atom (bool only_if_exists, string name) {
+                       return this.vala_intern_atom (only_if_exists, (uint16) name.length, name);
                }
                [CCode (cname = "xcb_intern_atom_unchecked")]
-               private InternAtomCookie vala_intern_atom_unchecked(bool only_if_exists,uint16 len, string 
name);
+               private InternAtomCookie vala_intern_atom_unchecked (bool only_if_exists, uint16 len, string 
name);
                [CCode (cname = "vala_xcb_intern_atom_unchecked")]
-               public InternAtomCookie intern_atom_unchecked(bool only_if_exists,string name) {
-                       return this.vala_intern_atom(only_if_exists,(uint16)name.length,name);
+               public InternAtomCookie intern_atom_unchecked (bool only_if_exists, string name) {
+                       return this.vala_intern_atom (only_if_exists, (uint16) name.length, name);
                }
-               public InternAtomReply intern_atom_reply(InternAtomCookie cookie, out GenericError? e);
+               public InternAtomReply? intern_atom_reply (InternAtomCookie cookie, out GenericError? e = 
null);
 
-               public GetAtomNameCookie get_atom_name(AtomT atom);
-               public GetAtomNameCookie get_atom_name_unchecked(AtomT atom);
-               public GetAtomNameReply get_atom_name_reply(GetAtomNameCookie cookie, out GenericError? e);
+               public GetAtomNameCookie get_atom_name (AtomT atom);
+               public GetAtomNameCookie get_atom_name_unchecked (AtomT atom);
+               public GetAtomNameReply? get_atom_name_reply (GetAtomNameCookie cookie, out GenericError? e = 
null);
 
                [CCode (cname = "xcb_change_property")]
-               private VoidCookie vala_change_property(PropMode mode, Window window, AtomT property, AtomT 
type, uint8 format, uint32 len, void *data);
+               private VoidCookie vala_change_property (PropMode mode, Window window, AtomT property, AtomT 
type, uint8 format, uint32 len, void *data);
                [CCode (cname = "vala_xcb_change_property")]
-               public VoidCookie change_property_uint8(PropMode mode, Window window, AtomT property, AtomT 
type, uint32 len, uint8 *data) {
-                       return this.vala_change_property(mode,window,property,type, 8, len, (void *)data);
+               public VoidCookie change_property_uint8 (PropMode mode, Window window, AtomT property, AtomT 
type, uint32 len, uint8 *data) {
+                       return this.vala_change_property (mode, window, property, type, 8, len, (void *)data);
                }
-               public VoidCookie change_property_uint16(PropMode mode, Window window, AtomT property, AtomT 
type, uint32 len, uint16 *data) {
-                       return this.vala_change_property(mode,window,property,type, 16, len, (void *)data);
+               public VoidCookie change_property_uint16 (PropMode mode, Window window, AtomT property, AtomT 
type, uint32 len, uint16 *data) {
+                       return this.vala_change_property (mode, window, property, type, 16, len, (void 
*)data);
                }
-               public VoidCookie change_property_uint32(PropMode mode, Window window, AtomT property, AtomT 
type, uint32 len, uint32 *data) {
-                       return this.vala_change_property(mode,window,property,type, 32, len, (void *)data);
+               public VoidCookie change_property_uint32 (PropMode mode, Window window, AtomT property, AtomT 
type, uint32 len, uint32 *data) {
+                       return this.vala_change_property (mode, window, property, type, 32, len, (void 
*)data);
                }
-               public VoidCookie change_property_atom(PropMode mode, Window window, AtomT property, AtomT 
type, uint32 len, AtomT *data) {
-                       return this.vala_change_property(mode,window,property,type, 32, len, (void *)data);
+               public VoidCookie change_property_atom (PropMode mode, Window window, AtomT property, AtomT 
type, uint32 len, AtomT *data) {
+                       return this.vala_change_property (mode, window, property, type, 32, len, (void 
*)data);
                }
-               public VoidCookie change_property_string(PropMode mode, Window window, AtomT property, AtomT 
type, string data) {
-                       return this.vala_change_property(mode,window,property,type, 8, data.length, (void 
*)data.data);
+               public VoidCookie change_property_string (PropMode mode, Window window, AtomT property, AtomT 
type, string data) {
+                       return this.vala_change_property (mode, window, property, type, 8, data.length, (void 
*)data.data);
                }
 
                [CCode (cname = "xcb_change_property_checked")]
-               private VoidCookie vala_change_property_checked(PropMode mode, Window window, AtomT property, 
AtomT type, uint8 format, uint32 len, void *data);
+               private VoidCookie vala_change_property_checked (PropMode mode, Window window, AtomT 
property, AtomT type, uint8 format, uint32 len, void *data);
                [CCode (cname = "vala_xcb_change_property_checked")]
-               public VoidCookie change_property_checked_uint8(PropMode mode, Window window, AtomT property, 
AtomT type, uint32 len, uint8 *data) {
-                       return this.vala_change_property(mode,window,property,type, 8, len, (void *)data);
+               public VoidCookie change_property_checked_uint8 (PropMode mode, Window window, AtomT 
property, AtomT type, uint32 len, uint8 *data) {
+                       return this.vala_change_property (mode, window, property, type, 8, len, (void *)data);
                }
-               public VoidCookie change_property_checked_uint16(PropMode mode, Window window, AtomT 
property, AtomT type, uint32 len, uint16 *data) {
-                       return this.vala_change_property(mode,window,property,type, 16, len, (void *)data);
+               public VoidCookie change_property_checked_uint16 (PropMode mode, Window window, AtomT 
property, AtomT type, uint32 len, uint16 *data) {
+                       return this.vala_change_property (mode, window, property, type, 16, len, (void 
*)data);
                }
-               public VoidCookie change_property_checked_uint32(PropMode mode, Window window, AtomT 
property, AtomT type, uint32 len, uint32 *data) {
-                       return this.vala_change_property(mode,window,property,type, 32, len, (void *)data);
+               public VoidCookie change_property_checked_uint32 (PropMode mode, Window window, AtomT 
property, AtomT type, uint32 len, uint32 *data) {
+                       return this.vala_change_property (mode, window, property, type, 32, len, (void 
*)data);
                }
-               public VoidCookie change_property_checked_atom(PropMode mode, Window window, AtomT property, 
AtomT type, uint32 len, AtomT *data) {
-                       return this.vala_change_property(mode,window,property,type, 32, len, (void *)data);
+               public VoidCookie change_property_checked_atom (PropMode mode, Window window, AtomT property, 
AtomT type, uint32 len, AtomT *data) {
+                       return this.vala_change_property (mode, window, property, type, 32, len, (void 
*)data);
                }
-               public VoidCookie change_property_checked_string(PropMode mode, Window window, AtomT 
property, AtomT type, string data) {
-                       return this.vala_change_property(mode,window,property,type, 8, data.length, (void 
*)data.data);
+               public VoidCookie change_property_checked_string (PropMode mode, Window window, AtomT 
property, AtomT type, string data) {
+                       return this.vala_change_property (mode, window, property, type, 8, data.length, (void 
*)data.data);
                }
 
                public VoidCookie delete_property_checked (Window window, AtomT property);
                public VoidCookie delete_property (Window window, AtomT property);
 
-               public GetPropertyCookie get_property(bool _delete, Window window, AtomT property, AtomT 
type, uint32 long_offset, uint32 long_length);
-               public GetPropertyCookie get_property_unchecked(bool _delete, Window window, AtomT property, 
AtomT type, uint32 long_offset, uint32 long_length);
-               public GetPropertyReply ? get_property_reply(GetPropertyCookie cookie, out GenericError? e);
+               public GetPropertyCookie get_property (bool _delete, Window window, AtomT property, AtomT 
type, uint32 long_offset, uint32 long_length);
+               public GetPropertyCookie get_property_unchecked (bool _delete, Window window, AtomT property, 
AtomT type, uint32 long_offset, uint32 long_length);
+               public GetPropertyReply? get_property_reply (GetPropertyCookie cookie, out GenericError? e = 
null);
 
                public ListPropertiesCookie list_properties (Window window);
                public ListPropertiesCookie list_properties_unchecked (Window window);
-               public ListPropertiesReply? list_properties_reply (ListPropertiesCookie cookie, out 
GenericError? e);
+               public ListPropertiesReply? list_properties_reply (ListPropertiesCookie cookie, out 
GenericError? e = null);
 
-               public VoidCookie configure_window(Window window, uint16 value_mask, uint32 *value_list);
-               public VoidCookie configure_window_checked(Window window, uint16 value_mask, uint32 
*value_list);
+               public VoidCookie configure_window (Window window, uint16 value_mask, uint32 *value_list);
+               public VoidCookie configure_window_checked (Window window, uint16 value_mask, uint32 
*value_list);
                
-               public VoidCookie reparent_window(Window window, Window parent, uint16 x, uint16 y);
-               public VoidCookie reparent_window_checked(Window window, Window parent, uint16 x, uint16 y);
+               public VoidCookie reparent_window (Window window, Window parent, uint16 x, uint16 y);
+               public VoidCookie reparent_window_checked (Window window, Window parent, uint16 x, uint16 y);
 
-               public GetGeometryCookie get_geometry(Drawable drawable);
-               public GetGeometryCookie get_geometry_unchecked(Drawable drawable);
-               public GetGeometryReply ? get_geometry_reply(GetGeometryCookie cookie, out GenericError ? e);
+               public GetGeometryCookie get_geometry (Drawable drawable);
+               public GetGeometryCookie get_geometry_unchecked (Drawable drawable);
+               public GetGeometryReply? get_geometry_reply (GetGeometryCookie cookie, out GenericError ? e);
 
                public VoidCookie set_selection_owner_checked (Window owner, AtomT selection, Timestamp time);
                public VoidCookie set_selection_owner (Window owner, AtomT selection, Timestamp time);
 
                public GetSelectionOwnerCookie get_selection_owner (AtomT selection);
                public GetSelectionOwnerCookie get_selection_owner_unchecked (AtomT selection);
-               public GetSelectionOwnerReply get_selection_owner_reply (GetSelectionOwnerCookie cookie, out 
GenericError? e);
+               public GetSelectionOwnerReply? get_selection_owner_reply (GetSelectionOwnerCookie cookie, out 
GenericError? e = null);
 
                public VoidCookie convert_selection_checked (Window requestor, AtomT selection, AtomT target, 
AtomT property, Timestamp time);
                public VoidCookie convert_selection (Window requestor, AtomT selection, AtomT target, AtomT 
property, Timestamp time);
@@ -169,7 +169,7 @@ namespace Xcb {
 
                public GrabPointerCookie grab_pointer (bool owner_events, Window grab_window, uint16 
event_mask, GrabMode pointer_mode, GrabMode keyboard_mode, Window confine_to, Cursor cursor, Timestamp time);
                public GrabPointerCookie grab_pointer_unchecked (bool owner_events, Window grab_window, 
uint16 event_mask, GrabMode pointer_mode, GrabMode keyboard_mode, Window confine_to, Cursor cursor, Timestamp 
time);
-               public GrabPointerReply grab_pointer_reply (GrabPointerCookie cookie, out GenericError? e);
+               public GrabPointerReply? grab_pointer_reply (GrabPointerCookie cookie, out GenericError? e = 
null);
 
                public VoidCookie ungrab_pointer_checked (Timestamp time);
                public VoidCookie ungrab_pointer (Timestamp time);
@@ -185,7 +185,7 @@ namespace Xcb {
 
                public GrabKeyboardCookie grab_keyboard (bool owner_events, Window grab_window, Timestamp 
time, GrabMode pointer_mode, GrabMode keyboard_mode);
                public GrabKeyboardCookie grab_keyboard_unchecked (bool owner_events, Window grab_window, 
Timestamp time, GrabMode pointer_mode, GrabMode keyboard_mode);
-               public GrabKeyboardReply grab_keyboard_reply (GrabKeyboardCookie cookie, out GenericError? e);
+               public GrabKeyboardReply? grab_keyboard_reply (GrabKeyboardCookie cookie, out GenericError? e 
= null);
 
                public VoidCookie ungrab_keyboard_checked (Timestamp time);
                public VoidCookie ungrab_keyboard (Timestamp time);
@@ -206,15 +206,15 @@ namespace Xcb {
 
                public QueryPointerCookie query_pointer (Window window);
                public QueryPointerCookie query_pointer_unchecked (Window window);
-               public QueryPointerReply query_pointer_reply (QueryPointerCookie cookie, out GenericError? e);
+               public QueryPointerReply? query_pointer_reply (QueryPointerCookie cookie, out GenericError? e 
= null);
 
                public GetMotionEventsCookie get_motion_events (Window window, Timestamp start, Timestamp 
stop);
                public GetMotionEventsCookie get_motion_events_unchecked (Window window, Timestamp start, 
Timestamp stop);
-               public GetMotionEventsReply get_motion_events_reply (GetMotionEventsCookie cookie, out 
GenericError? e);
+               public GetMotionEventsReply? get_motion_events_reply (GetMotionEventsCookie cookie, out 
GenericError? e = null);
 
                public TranslateCoordinatesCookie translate_coordinates (Window src_window, Window 
dst_window, int16 src_x, int16 src_y);
                public TranslateCoordinatesCookie translate_coordinates_unchecked (Window src_window, Window 
dst_window, int16 src_x, int16 src_y);
-               public TranslateCoordinatesReply translate_coordinates_reply (TranslateCoordinatesCookie 
cookie, out GenericError? e);
+               public TranslateCoordinatesReply? translate_coordinates_reply (TranslateCoordinatesCookie 
cookie, out GenericError? e = null);
 
                public VoidCookie warp_pointer_checked (Window src_window, Window dst_window, int16 src_x, 
int16 src_y, uint16 src_width, uint16 src_height, int16 dst_x, int16 dst_y);
                public VoidCookie warp_pointer (Window src_window, Window dst_window, int16 src_x, int16 
src_y, uint16 src_width, uint16 src_height, int16 dst_x, int16 dst_y);
@@ -224,7 +224,7 @@ namespace Xcb {
 
                public GetInputFocusCookie get_input_focus ();
                public GetInputFocusCookie get_input_focus_unchecked ();
-               public GetInputFocusReply get_input_focus_reply (GetInputFocusCookie cookie, out 
GenericError? e);
+               public GetInputFocusReply? get_input_focus_reply (GetInputFocusCookie cookie, out 
GenericError? e = null);
 
                //query_keymap
 
@@ -246,7 +246,7 @@ namespace Xcb {
 
                public QueryFontCookie query_font (Fontable font);
                public QueryFontCookie query_font_unchecked (Fontable font);
-               public QueryFontReply query_font_reply (QueryFontCookie cookie, out GenericError? e);
+               public QueryFontReply? query_font_reply (QueryFontCookie cookie, out GenericError? e = null);
 
                /*[CCode (cname = "xcb_query_text_extents")]
                private QueryTextExtentsCookie vala_query_text_extents (Fontable font, uint32 string_len, 
Char2b* s);
@@ -260,7 +260,7 @@ namespace Xcb {
                public QueryTextExtentsCookie query_text_extents_unchecked (Fontable font, uint16[] s) { // 
FIXME: How to handle Char2b?
                        this.vala_query_text_extents_unchecked (font, s.length, s);
                }
-               public QueryTextExtentsReply query_text_extents_reply (QueryTextExtentsCookie cookie, out 
GenericError? e);*/
+               public QueryTextExtentsReply? query_text_extents_reply (QueryTextExtentsCookie cookie, out 
GenericError? e = null);*/
 
                [CCode (cname = "xcb_list_fonts")]
                private ListFontsCookie vala_list_fonts (uint16 max_names, uint16 pattern_len, string 
pattern);
@@ -274,7 +274,7 @@ namespace Xcb {
                public ListFontsCookie list_fonts_unchecked (uint16 max_names, string pattern) {
                        return this.vala_list_fonts_unchecked (max_names, (uint16) pattern.length, pattern);
                }
-               public ListFontsReply list_fonts_reply (ListFontsCookie cookie, out GenericError? e);
+               public ListFontsReply? list_fonts_reply (ListFontsCookie cookie, out GenericError? e = null);
 
                [CCode (cname = "xcb_list_fonts_with_info")]
                private ListFontsWithInfoCookie vala_list_fonts_with_info (uint16 max_names, uint16 
pattern_len, string pattern);
@@ -288,13 +288,13 @@ namespace Xcb {
                public ListFontsWithInfoCookie list_fonts_with_info_unchecked (uint16 max_names, string 
pattern) {
                        return this.vala_list_fonts_with_info_unchecked (max_names, (uint16) pattern.length, 
pattern);
                }
-               public ListFontsWithInfoReply list_fonts_with_info_reply (ListFontsWithInfoCookie cookie, out 
GenericError? e);
+               public ListFontsWithInfoReply? list_fonts_with_info_reply (ListFontsWithInfoCookie cookie, 
out GenericError? e = null);
 
                //set_font_path
 
                public GetFontPathCookie get_font_path ();
                public GetFontPathCookie get_font_path_unchecked ();
-               public GetFontPathReply get_font_path_reply (GetFontPathCookie cookie, out GenericError? e);
+               public GetFontPathReply? get_font_path_reply (GetFontPathCookie cookie, out GenericError? e = 
null);
 
                public VoidCookie create_pixmap_checked (uint8 depth, Pixmap pid, Drawable drawable, uint16 
width, uint16 height);
                public VoidCookie create_pixmap (uint8 depth, Pixmap pid, Drawable drawable, uint16 width, 
uint16 height);
@@ -358,7 +358,7 @@ namespace Xcb {
 
                public GetImageCookie get_image (ImageFormat format, Drawable drawable, int16 x, int16 y, 
uint16 width, uint16 height, uint32 plane_mask);
                public GetImageCookie get_image_unchecked (ImageFormat format, Drawable drawable, int16 x, 
int16 y, uint16 width, uint16 height, uint32 plane_mask);
-               public GetImageReply get_image_reply (GetImageCookie cookie, out GenericError? e);
+               public GetImageReply? get_image_reply (GetImageCookie cookie, out GenericError? e = null);
 
                public VoidCookie poly_text_8_checked (Drawable drawable, GContext gc, int16 x, int16 y, 
[CCode (array_length_pos = 4.9, array_length_type = "uint32_t")] uint8[] items);
                public VoidCookie poly_text_8 (Drawable drawable, GContext gc, int16 x, int16 y, [CCode 
(array_length_pos = 4.9, array_length_type = "uint32_t")] uint8[] items);
@@ -398,11 +398,11 @@ namespace Xcb {
 
                public ListInstalledColormapsCookie list_installed_colormaps (Window window);
                public ListInstalledColormapsCookie list_installed_colormaps_unchecked (Window window);
-               public ListInstalledColormapsReply list_installed_colormaps_reply 
(ListInstalledColormapsCookie cookie, out GenericError? e);
+               public ListInstalledColormapsReply? list_installed_colormaps_reply 
(ListInstalledColormapsCookie cookie, out GenericError? e = null);
 
                public AllocColorCookie alloc_color (Colormap cmap, uint16 red, uint16 green, uint16 blue);
                public AllocColorCookie alloc_color_unchecked (Colormap cmap, uint16 red, uint16 green, 
uint16 blue);
-               public AllocColorReply alloc_color_reply (AllocColorCookie cookie, out GenericError? e);
+               public AllocColorReply? alloc_color_reply (AllocColorCookie cookie, out GenericError? e = 
null);
 
                [CCode (cname = "xcb_alloc_named_color")]
                private AllocNamedColorCookie vala_alloc_named_color (Colormap cmap, uint16 name_len, string 
name);
@@ -416,15 +416,15 @@ namespace Xcb {
                public AllocNamedColorCookie alloc_named_color_unchecked (Colormap cmap, string name) {
                        this.vala_alloc_named_color_unchecked (cmap, (uint16) name.length, name);
                }
-               public AllocNamedColorReply alloc_named_color_reply (AllocNamedColorCookie cookie, out 
GenericError? e);
+               public AllocNamedColorReply? alloc_named_color_reply (AllocNamedColorCookie cookie, out 
GenericError? e = null);
 
                public AllocColorCellsCookie alloc_color_cells (bool contiguous, Colormap cmap, uint16 
colors, uint16 planes);
                public AllocColorCellsCookie alloc_color_cells_unchecked (bool contiguous, Colormap cmap, 
uint16 colors, uint16 planes);
-               public AllocColorCellsReply alloc_color_cells_reply (AllocColorCellsCookie cookie, out 
GenericError? e);
+               public AllocColorCellsReply? alloc_color_cells_reply (AllocColorCellsCookie cookie, out 
GenericError? e = null);
 
                public AllocColorPlanesCookie alloc_color_planes (bool contiguous, Colormap cmap, uint16 
colors, uint16 reds, uint16 greens, uint16 blues);
                public AllocColorPlanesCookie alloc_color_planes_unchecked (bool contiguous, Colormap cmap, 
uint16 colors, uint16 reds, uint16 greens, uint16 blues);
-               public AllocColorPlanesReply alloc_color_planes_reply (AllocColorPlanesCookie cookie, out 
GenericError? e);
+               public AllocColorPlanesReply? alloc_color_planes_reply (AllocColorPlanesCookie cookie, out 
GenericError? e = null);
 
                public VoidCookie free_colors_checked (Colormap cmap, uint32 plane_mask, [CCode 
(array_length_pos = 2.9, array_length_type = "uint32_t")] uint32[] pixels);
                public VoidCookie free_colors (Colormap cmap, uint32 plane_mask, [CCode (array_length_pos = 
2.9, array_length_type = "uint32_t")] uint32[] pixels);
@@ -447,7 +447,7 @@ namespace Xcb {
 
                public QueryColorsCookie query_colors (Colormap cmap, [CCode (array_length_pos = 1.9, 
array_length_type = "uint32_t")] uint32[] pixels);
                public QueryColorsCookie query_colors_unchecked (Colormap cmap, [CCode (array_length_pos = 
1.9, array_length_type = "uint32_t")] uint32[] pixels);
-               public QueryColorsReply query_colors_reply (QueryColorsCookie cookie, out GenericError? e);
+               public QueryColorsReply? query_colors_reply (QueryColorsCookie cookie, out GenericError? e = 
null);
 
                [CCode (cname = "xcb_lookup_color")]
                private LookupColorCookie vala_lookup_color (Colormap cmap, uint16 name_len, string name);
@@ -461,7 +461,7 @@ namespace Xcb {
                public LookupColorCookie lookup_color_unchecked (Colormap cmap, string name) {
                        this.vala_lookup_color_unchecked (cmap, (uint16) name.length, name);
                }
-               public LookupColorReply lookup_color_reply (LookupColorCookie cookie, out GenericError? e);
+               public LookupColorReply? lookup_color_reply (LookupColorCookie cookie, out GenericError? e = 
null);
 
                public VoidCookie create_cursor_checked (Cursor cid, Pixmap source, Pixmap mask, uint16 
fore_red, uint16 fore_green, uint16 fore_blue, uint16 back_red, uint16 back_green, uint16 back_blue, uint16 
x, uint16 y);
                public VoidCookie create_cursor (Cursor cid, Pixmap source, Pixmap mask, uint16 fore_red, 
uint16 fore_green, uint16 fore_blue, uint16 back_red, uint16 back_green, uint16 back_blue, uint16 x, uint16 
y);
@@ -477,7 +477,7 @@ namespace Xcb {
 
                public QueryBestSizeCookie query_best_size (uint8 _class, Drawable drawable, uint16 width, 
uint16 height); // FIXME: Is there an enum for class?
                public QueryBestSizeCookie query_best_size_unchecked (uint8 _class, Drawable drawable, uint16 
width, uint16 height);
-               public QueryBestSizeReply query_best_size_reply (QueryBestSizeCookie cookie, out 
GenericError? e);
+               public QueryBestSizeReply? query_best_size_reply (QueryBestSizeCookie cookie, out 
GenericError? e = null);
 
                [CCode (cname = "xcb_query_extension")]
                private QueryExtensionCookie vala_query_extension (uint16 name_len, string name);
@@ -491,11 +491,11 @@ namespace Xcb {
                public QueryExtensionCookie query_extension_unchecked (string name) {
                        return this.vala_query_extension_unchecked ((uint16) name.length, name);
                }
-               public QueryExtensionReply query_extension_reply (QueryExtensionCookie cookie, out 
GenericError? e);
+               public QueryExtensionReply? query_extension_reply (QueryExtensionCookie cookie, out 
GenericError? e = null);
 
                public ListExtensionsCookie list_extensions ();
                public ListExtensionsCookie list_extensions_unchecked ();
-               public ListExtensionsReply list_extensions_reply (ListExtensionsCookie cookie, out 
GenericError? e);
+               public ListExtensionsReply? list_extensions_reply (ListExtensionsCookie cookie, out 
GenericError? e = null);
 
                //change_keyboard_mapping
 
@@ -517,14 +517,14 @@ namespace Xcb {
 
                public GetScreenSaverCookie get_screen_saver ();
                public GetScreenSaverCookie get_screen_saver_unchecked ();
-               public GetScreenSaverReply get_screen_saver_reply (GetScreenSaverCookie cookie, out 
GenericError? e);
+               public GetScreenSaverReply? get_screen_saver_reply (GetScreenSaverCookie cookie, out 
GenericError? e = null);
 
                public VoidCookie change_hosts_checked (HostMode mode, Family family, [CCode 
(array_length_pos = 2.9, array_length_type = "uint16_t")] uint8[] address);
                public VoidCookie change_hosts (HostMode mode, Family family, [CCode (array_length_pos = 2.9, 
array_length_type = "uint16_t")] uint8[] address);
 
                public ListHostsCookie list_hosts ();
                public ListHostsCookie list_hosts_unchecked ();
-               public ListHostsReply list_hosts_reply (ListHostsCookie cookie, out GenericError? e);
+               public ListHostsReply? list_hosts_reply (ListHostsCookie cookie, out GenericError? e = null);
 
                public VoidCookie set_access_control_checked (AccessControl mode);
                public VoidCookie set_access_control (AccessControl mode);
@@ -626,9 +626,9 @@ namespace Xcb {
                public uint8 format;
                public AtomT type;
                [CCode (cname = "xcb_get_property_value_length")]
-               public int32 value_length();
+               public int32 value_length ();
                [CCode (cname = "xcb_get_property_value")]
-               public unowned void *value();
+               public unowned void *value ();
        }
 
        [SimpleType]
@@ -675,7 +675,7 @@ namespace Xcb {
        public class ListPropertiesReply {
                private uint16 atoms_len;
                [CCode (cname = "xcb_list_properties_atoms")]
-               private Atom* vala_atoms();
+               private Atom* vala_atoms ();
                public Atom[] atoms
                {
                        get
@@ -2066,7 +2066,7 @@ namespace Xcb {
                public Window parent;
                public uint16 children_len;
                [CCode (cname = "xcb_query_tree_children", array_length = false)]
-               public Window* children();
+               public Window* children ();
        }
 
        [SimpleType]


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